Not sure which deficiency it is...Please HELP!!!

Autoberry @25 days
300w LEDs 1x 5gal DWC, ph 6.0 1200 ppm 24/0 lights 78-81F 38-45 humidity
Some of the leaves have darker veins. I'm Using General Hydroponics Flora Series. I added nutes at day 21 and it is now day 25
And a few tips started to curl downIn between the Veins is getting lighter in color (Im color blind so I cant tell which deficiency it could be)